Alternative Name(s): Yellow trumpet vine, Golden allamanda, Golden cup Family: Apocynaceae Form: Shrub Origin: Native to north-eastern South America Weed Type(s): Weed, Sleeper Weed, Naturalised, Introduced, Garden Escape, Environmental Weed, Cultivation Escape

photo. C. Wilson

Notes: Yellow Allamanda is scrambling shrub or vigorous evergreen climber up to 16m high. It has glossy-green leathery leaves. Large yellow, trumpet-shaped flowers up to 120mm are prominent in summer and autumn. The rounded fruit is covered in spines about 10mm long.

Yellow allamanda was listed in Victorian nursery catalogues as early as 1855. It was first recorded as naturalised in North Queensland in 1945 but had been grown in Brisbane Botanical Gardens in 1933. It is spread by wind and water and is now widely naturalised in rainforests from North and Central Queensland. There are several colour forms and it is widely available in nurseries.

References:

Randall, R. P. (2002). A Global Compendium of Weeds. R. G. & F.J. Richardson, Melbourne.
Csurhes, S. and Edwards, R. (1998). Potential Environmental Weeds in Australia. National Weeds Program, Environment Australia, Canberra.
Parker, J. and Malone, M. eds. (2003). Gardening Australia: Flora: the gardener's bible over 20,000 plants. ABC Books, Sydney.
Batianoff, G. N. (2004). Personal communication.